Ryan McCarthy, President Trump's choice to serve as under secretary of the Army, is filling the service's top civilian post on an interim basis. The former Lockheed Martin executive was confirmed by the Senate to serve as the 33rd under secretary of the Army on a voice vote Aug. 1. According to an Army spokeswoman, he was designated as acting secretary the following day. During a July 12 nomination hearing, McCarthy acknowledged the service's history of modernization challenges and emphasized...